Заменить значения всех элементов третьего столбца массива на число -12 — Pascal(Паскаль)

program Dekio;

const
  n = 5;
  m = 8;

var
  arr: array [1 .. n, 1 .. m] of integer;
  i, j: integer;

begin
  randomize;
  writeln('Массив');
  for i := 1 to n do
  begin
    for j := 1 to m do
    begin
      arr[i, j] := random(30) - 5;
      write(arr[i, j]:4);
    end;
    writeln;
  end;
  writeln('Результат');
  for i := 1 to n do
  begin
    for j := 1 to m do
    begin
      arr[i, 3] := -12;
      write(arr[i, j]:4);
    end;
    writeln;
  end;

end.

program Dekio;

const
  n = 5;
  m = 8;

var
  arr: array [1 .. n, 1 .. m] of integer;
  i, j: integer;

begin
  randomize;
  writeln('Массив');
  for i := 1 to n do
  begin
    for j := 1 to m do
    begin
      arr[i, j] := random(30) - 5;
      arr[i, 3] := -12;
      write(arr[i, j]:5);
    end;
    writeln;
  end;

end.